*The old, irregular simple-past form, buk, is rarely used in modern German.

BACKENPresent Tense - Präsens

Stem-Changing Verbs: The verb backen belongs to a class of German verbs known as "stem-changing" verbs. Such verbs alter their stem vowel in the du and er/sie/es forms only (in the present tense). For more, see Stem-Changing Verbs.